Bottom-forming mechanism for paper bags.



J. PERRY.

BOTTOM FORMING MECHANISM FOR PAPER BAGS.

' APFLICAUON HLED'AUGA. 1917.

1,269,5G3. PatentedJune11,1918f JAMES PERRY, F SOMERVILLE, MASSACHUSETTS, ASSIGNOIB, TO LOCKIPORT MACHINE CGMFAIVY, OF NEW YORK, ILY A PARTNERSHIP COMPOSED OI! WILLIA M'MUIR- HEAD AND JAMES PERRY.

BOTTOM-FORMING MECHANISM FOR PAPER BAGS.

. menses.

Specification of Letters Patent.

Application filed August 4, 191?. Serial No. 184,370.

To all whom it may concern be it known that 1, JAMES PERRY, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Bottom-Forming Mechanism for Paper Bags, of which the following is a specification.

This invention relates to an improved mechanism for applying adhesive material to a paper bag tube and for folding said paper bag tube to form the bottom thereof.

The object of the invention is to provide a mechanism of the character herein set forth which will rapidly and neatly fold one end of a paper bag tube to form the bottom thereof and will also apply adhesive material so as to hold the folded portions at tached to the main body portion of the paper bag tube, the adhesive material applying member being arranged so as to be adjusted toward and away from the folding member, so that the paste or other adhesive material may he applied at any desired distance from the end of the paper bag tube.

The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claiins thereof.

Referring to the drawings:

Figure 1 is a plan view of a portion of a paper bag machine embodying my invention.

Fig. 2 is a sectional elevation taken on line 22 of Fig. 1.

Fig. 3 is a sectional elevation taken on line 33 of Fig. 1.

Like numerals refer to like parts throughout the several views of, the drawings.

In the drawings, 5 and 6 are rotary feed members. The rot ry feed member 5 consists of a feed roll 7 which is fastened to a shaft 8, said shaft being journaled to rotate in bearings 9 on the frame 10 of the machine.

A pair of carrier members 11' are fastened to the shaft 8 adjacent to opposite ends of the roll 7 and between said roll and said carrier members are fastened .a pair of disks 12, to which disks is fastened a bar 13 which projects through a slot 14 in the feed roll 7 and has a paste applying blade 15 fastened thereto, the outer edge of the paste applymg blade rejecting beyond the periphery of the fee roll 7. a

A folder blade 16 is fastened a bar 17 which also extends through the slot I l and Patented June 11, 1918.

is fastened at its opposite ends to the carrier members 11.

Paste is applied to the outer edge of the blade 15 by a paste carrying roll 18 which is fast to a shaft 19 journaled to rotate in bearings 20 and having fastened thereto a gear 21 which meshes into a gear 22 fast 1 to the shaft 8. The paste carrying roll 18 rotates in a paste pot 23 supported upon the frame of the machine.

The outer edges of the paste applying blade 15 and folder blade 16 both project beyond the periphery of the roll 7 and the pasteapplying blade 15 is adjustable toward and away from the folder blade 16 by reason of the fact that the disks 12 are adjustably fastened tothe carrier members 11 by screws 24 which extend through slots 25 in said. carrier members 11 and have screw-threaded engagement with the disks 12, so that by looseningthe screws 24 the disks 12 may be rotated upon the shaft 8, thus moving the bar 13 and causing the'paste applying blade 15 to'be moved toward or away from the folder blade 16 to any desired extent. When the paste applying blade has been adjusted to the desired position it is clamped firmly in place by screwing up on the screws The rotary feed member 6 consists of a feed roll 26 which is fastened to a shaft 27 journaled to rotate in the bearings 9 and said shaft 27 is rotated by a gear 28. fast thereto and meshing into the gear 22 fast to the shaft 8. The roll 26 is provided with a gripper blade 30 which is fastened to a rock-shaft 31 journaled to rock in said roll, and a rocking movement is imparted to said shaft byan arm 32 fast to one end of said rock-shaft and provided at its outer end with a 1011 33 which is adapted to engage a stationary cam 34.- fastened to theframe of the machine. The. roll 33 is kept in engagement with the periphery of the cam 34 by a torsional spring 35, one end of which is fasto a bracket e0 fast to the frame of the ma by suitable mechanism (not shown in the feed rolls 7 and 26,

drawings) between the rotate in the direcand as said feed rolls tion of the arrows (Fig 3) 16 will grip the end of the paper bag tube and force it in between the gripper blade 30 and the feed roll 26, upon which said gripper blade is mounted, forcing the folded portion of the paper bag tube into a slot 43 provided in the periphery of said feed roll 26. The outer edge of the paste applying blade 15 will contact with the paper bag tube, as illustrated in Fig. 3, and as the rolls 7 and 26 continue their rotary movement the roll 33 will be actuated by the combined'action of the cam 34 and spring 35 and grip the folded portion of the paper bag tube between the blade 30 and said feed roll 26, while the blades'16 and 15 will pass on out of contact with the paper bag tub'e, being carried out of contact therewith by the mo tion of the feed roll and the folded end of the paper bag tube will then be carried on by the continued movement of the feed roll 26 until brought into contact with the presser roll 37, which will lay the already folded end of the paper bag tube over upon said paper bag tube on that portion. thereof which has been previously supplied with paste by the blade 15 and thus the bottom of the bag will be formed and pasted.

Having thus described my invention,

what I claim and desire by Letters Patent to secure is:

1. A bottom forming mechanism for paper bags having, in combination, a pair of rotary feed members, a folder blade and a paste applying blade fast to one of said feed members, means to adjust said paste applying blade relatively to said folder blade, a gripper blade movably mounted on the other of said feed members, with its the folder blade,

naeaeoe outer edge projecting between said folder and paste applying blades, and means to move said gripper blade toward and away from said folder blade.

,2. A bottom forming mechanism for paper bags having, in combination, a pair of rotary feed rolls, a folder blade and a paste applying blade fast to one of said rolls, each of said blades rojectipg beyond the periphery of said rolf means to adjust said paste applying blade relatively to said folder blade, a gripper blade movably mounted on the other ofsaid rolls, with its outer edge projecting between said folder and paste applying'blades, and means to move said gripper blade toward and away from said folder blade;

3. A bottom forming mechanism for paper bags having, of rotary feed members, each comprising a shaft and a roll fast thereto, a pair of disks fast to the shaft of one of said feed rolls at opposite ends of said roll, a pair of carrier members interposed between said disks and the adjacent ends of said rolls, means to adjustably fasten said carrier members to said disks, a bar fastened'at its opposite ends to said carrier members and extending longitudinally thereof through a slot provided in said roll, a paste applying blade fast to said bar and projecting at its outer. edge beyond the periphery of said roll, a folding blade fast to said disks and extending Ionnesses.

JAMES PERRY. Witnesses CHARLES S. Goonrno, DANIEL A. Remus.

in combination, a pair 

